I know you two are rival enemies.
How comes this gentle concord in the world,
That hatred is so far from jealousy
To sleep by hate and fear no enmity?
– William Shakespeare
A Midsummer Night’s Dream, Act 4, Scene 1. Theseus is shocked to discover "rival enemies" Demetrius and Lysander sleeping peacefully by one another in the woods. He is puzzled that they don’t fear and appear to trust one another, especially since they were bitter rivals for Hermia’s affection.